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In the nineteen nineties, Gebisa Ejeta and another Purdue researcher, Larry Butler, identified the complex relationships between Striga and sorghum plants.
VOA: special.2009.06.16
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I've been here in MIT for thirty years, and in the early nineties I taught the large freshmen physics course, and electromagnetism.
我麻省理工工作三十年了，在上世纪九十年代初,我就开始给大一新生上物理课，以及电磁学。
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There was... a few years there, I think, in the early nineties,
我想在几年前，也就是九十年代初，
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The depression ended. The economic depression of the eighteen nineties forced Americans to worry first about developments at home.
VOA: special.2010.07.01
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Particularly the course I taught in the early nineties have 600 students there.
尤其是我在九十年代讲的物理课,有600多个学生。
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In the nineteen eighties and nineties, an American television comedy series told about four older women living in Miami,Florida.
VOA: special.2010.06.06
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The name for the band Dengue Fever came to Ethan Holtzman during his travels in Cambodia in the late nineteen nineties.
VOA: special.2011.05.06
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In the late nineteen nineties, the Canadian professor was working in Nepal when his return flight was canceled.
VOA: special.2009.12.21
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We have a big job on our hands." World hunger has been rising slowly since the late nineties.
VOA: special.2009.09.22
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In the nineteen nineties, DJ Jazzy Jeff and the Fresh Prince produced this hip-hop song called "Summertime."
VOA: special.2009.06.22
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In the nineteen nineties, New York City officials started a campaign to remove signs of disorder like broken windows, graffiti markings and trash.
VOA: special.2009.03.03
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Miz Cheek says, since the nineteen nineties, the Securities and Exchange Commission has tried to get financial companies to give clearer product descriptions.
VOA: special.2010.04.30
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"You have had a decade or more in Africa of very slow economic progress in the nineties.
VOA: special.2010.04.26
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His company failed. In the eighteen nineties, an American company tried to build a canal across Nicaragua.
VOA: special.2010.08.12
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Researchers say it resulted in fifty-six thousand hospital emergency room visits a year during the nineteen nineties.
VOA: special.2009.07.21
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The collapse of the Soviet Union and the breakup of Yugoslavia in the nineteen nineties challenged NATO's traditional position as a defensive alliance.
VOA: special.2009.04.04
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But since the late nineteen nineties, inventors of business methods and processes have increasingly sought patent protection.
VOA: special.2010.07.16
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Researchers say it resulted in fifty-six thousand emergency room visits a year during the nineteen nineties.
VOA: special.2009.07.08
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During the nineteen nineties,her book "Their Eyes Were Watching God" sold more than one million copies.
VOA: special.2009.02.22
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In the eighteen nineties, the American people were deeply divided over the nation's money system.
VOA: special.2010.07.01
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Susan Larson was a children's librarian in the late nineteen nineties and early two thousands.
VOA: special.2009.08.24
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Ellen Parlapiano and Patricia Cobe started using the term "mompreneurs" in the late nineteen nineties.
VOA: special.2010.04.23
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Control over our lives!" The president,at his own meetings, pointed back to the nineteen nineties.
VOA: special.2009.08.14
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Walter Schmidt has been working to find uses for chicken feathers since the nineteen nineties.
VOA: special.2010.06.01
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In the nineteen nineties, the drug company Parke Davis paid another company, Medical Education Systems, to produce journal articles in support of one of its drugs.
VOA: special.2009.10.08
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And there was another strong period of building in the nineties and beyond.
VOA: special.2009.07.13
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The situation threatens gains made in its rhino populations in the nineteen nineties.
VOA: special.2009.12.14
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This compares with about sixteen million hectares per year during the nineteen nineties.
VOA: special.2010.04.06
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The group says that was double the amount raised in the nineteen nineties.
VOA: special.2009.06.12
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The last major effort to reform health care failed in the early nineties.
VOA: special.2009.05.15
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